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(4√2x-√30)(4√2X+√30)-3(x√5+1)

Răspuns :

=4²√2²x²-√30²-3x√5-3
=16×2x²-30-3x√3-3
=32x²-30-3-3x√5
=32x²-33-3x√5
(4√2x-√30)(4√2X+√30)-3(x√5+1) = 

= 16
·2·x² + 4√60x - 4√60x - 30 -3√5x - 3

= 32x² - 3√5x - 33